Mastering Multiplication by Powers of Ten

In this video, Mr. J guides fifth-grade students through a mastery check on multiplying whole numbers by powers of 10. The video begins with instructions on how to complete the mastery check, encouraging students to solve eight problems independently. Mr. J then provides detailed solutions for each problem, explaining the process of using zeros to adjust place values. The video concludes with a summary of the mastery check results and an introduction to the next topic, multiplying decimals by powers of 10.

What should you have ready before starting the mastery check?

• A calculator

• A computer

• Something to write with and something to write on

• A textbook

How many problems are you supposed to solve in this mastery check?

• 8

• 7

• 6

• 5

What is the product of 45 times 10?

• 4.5

• 4,500

• 450

• 45

How many zeros do you add to 50 when multiplying by 100?

• 4

• 3

• 2

• 1

What is the result of 189 times 1,000?

• 18,900

• 1,890

• 189,000

• 1,890,000

What is 7 times 10 to the fourth power?

• 7,000

• 7,000,000

• 70,000

• 700,000

What is the product of 90 and 1,000?

• 900

• 9,000

• 90,000

• 900,000

How many zeros are added to 12 when multiplying by 10,000?

• 2

• 3

• 4

• 5

What is the result of 475 times 100?

• 4,750

• 47,500

• 475,000

• 4,750,000

What is 91 times 100?

• 9,000

• 9,100

• 910

• 91,000